{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["place of death", "place of birth", "education institution", "education degree"], "input": "Michael Heidelberger took their advice and in 1911 went to Zurich to work for a year in the laboratory of the organic chemist and future Nobel Laureate Richard Willstatter at the Eidgenossische Technische Hochschule. There he perfected the synthesis of cyclooctatetraene, an important intermediate in organic research. Willstatter helped his somewhat impecunious American student by sharing the cost of laboratory supplies with him, arranging that when expensive materials, such as silver nitrate, were to be bought, it was his turn to pay, while Heidelberger took turns buying cheaper materials like sulfuric acid. ``Better training than that you couldn't have,'' Heidelberger summed up his experience with Willstatter. They remained friends for three decades, through Willstatter's flight from Germany in 1938 and until his death in Switzerland in 1942."}
{"place of death": [{"subject": "Michael Heidelberger", "object": "Switzerland"}], "place of birth": [], "education institution": [], "education degree": []}